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参数资料
型号： AD7190BRUZ-REEL
厂商： Analog Devices Inc
文件页数： 8/41页
文件大小： 0K
描述： IC ADC 2CH 24BIT W/PGA 24TSSOP
设计资源： Precision Weigh Scale Design Using AD7190 with Internal PGA (CN0102)
标准包装： 2,500
位数： 24
采样率（每秒）： 4.8k
数据接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
转换器数目： 1
电压电源： 模拟和数字
工作温度： -40°C ~ 105°C
安装类型： 表面贴装
封装/外壳： 24-TSSOP（0.173"，4.40mm 宽）
供应商设备封装： 24-TSSOP
包装： 带卷 (TR)
输入数目和类型： 2 个差分，双极；4 个伪差分，双极
Data Sheet
AD7190
Rev. C | Page 15 of 40
RMS NOISE AND RESOLUTION
The AD7190 has a choice of two filter types: sinc4 and sinc3.
In addition, the AD7190 can be operated with chop enabled
or chop disabled.
The following tables show the rms noise of the AD7190 for some
of the output data rates and gain settings with chop disabled
and enabled for the sinc4 and sinc3 filters. The numbers given
are for the bipolar input range with the external 5 V reference.
These numbers are typical and are generated with a differential
input voltage of 0 V when the ADC is continuously converting
on a single channel. The effective resolution is also shown, and
the output peak-to-peak (p-p) resolution, or noise-free resol-
ution, is listed in parentheses. It is important to note that the
effective resolution is calculated using the rms noise, wheras the
p-p resolution is calculated based on peak-to-peak noise. The
p-p resolution represents the resolution for which there is no
code flicker. These numbers are typical and are rounded to the
nearest LSB.
SINC4 CHOP DISABLED
Table 6. RMS Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
Output Data
Rate (Hz)
Settling
Time (ms)
Gain of 1
Gain of 8
Gain of 16
Gain of 32
Gain of 64
Gain of 128
1023
4.7
852.5
250
38
21
12
10
8.5
640
7.5
533
310
45
25
16
12
10.5
480
10
400
330
50
30
18
14
11.5
96
50
80
900
125
78
45
33
28
80
60
66.7
970
140
88
52
36
31
32
150
26.7
1460
215
125
75
55
48
16
300
13.3
1900
285
170
100
75
67
5
960
4.17
3000
480
280
175
140
121
2
2400
1.67
5000
780
440
280
220
198
1
4800
0.83
14,300
1920
1000
550
380
295
Table 7. Effective Resolution (Peak-to-Peak Resolution) vs. Gain and Output Data Rate
Filter Word
(Decimal)
Output Data
Rate (Hz)
Settling
Time (ms)
Gain of 11
Gain of 81
Gain of 161
Gain of 321
Gain of 641
Gain of 1281
1023
4.7
852.5
24 (22.5)
24 (22)
24 (21)
23 (20.5)
640
7.5
533
24 (22)
24 (21.5)
23.5 (21)
23 (20)
480
10
400
24 (22)
24 (21.5)
23.5 (20.5)
22.5 (20)
96
50
80
23.5 (20.5)
23 (20)
22.5 (20)
22 (19.5)
21.5 (18.5)
80
60
66.7
23.5 (20.5)
23 (20.5)
22.5 (20)
22 (19.5)
21.5 (18.5)
32
150
26.7
22.5 (20)
22.5 (19.5)
22 (19.5)
21.5 (18.5)
20.5 (18)
16
300
13.3
22.5 (19.5)
22 (19.5)
22 (19)
21.5 (19)
21 (18.5)
20 (17.5)
5
960
4.17
21.5 (19)
21.5 (18.5)
21 (18.5)
21 (18)
20 (17.5)
19.5 (16.5)
2
2400
1.67
21 (18)
20.5 (18)
20.5 (17.5)
20 (17.5)
19.5 (16.5)
18.5 (16)
1
4800
0.83
19.5 (16.5)
19 (16.5)
18.5 (16)
18 (15.5)
1
The output peak-to-peak (p-p) resolution is listed in parentheses.
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